JP2021049128A - Fire extinguisher - Google Patents

Abstract

To provide a fire extinguisher capable of reliably extinguishing a fire by ejecting fire-extinguishing gas to a fire breakout place, which can be installed easily.SOLUTION: A fire extinguisher 1 is composed of a planar ejection part 2 inserted into an insertion hole D1 formed on a bottom face of a duct D, and a fire-extinguishing gas storage part 3 connected to a bottom part of the ejection part 2. The ejection part 2 is composed of a cylindrical body part 2a, an ejection hole 2b provided on a lateral face of the body part 2a which is long and thin in a vertical direction, and a sealing body 2c for occluding and sealing the ejection hole 2b. When a temperature that has risen by a fire becomes a predetermined fusion temperature of the sealing body 2c or higher, the sealing body 2c sealing the ejection part 2 fuses, and fire-extinguishing gas G in the ejection part 2 and the fire-extinguishing gas storage part 3b is ejected from the ejection hole 2b. The fire-extinguishing gas G pressurized in the ejection part 2 is ejected from the ejection hole 2b, flows out in a downstream direction while expanding in the duct D, and extinguishes the fire of an exhaust fan F.SELECTED DRAWING: Figure 2

Description

The present invention relates to a fire extinguishing device that is attached to an air supply / exhaust duct of a factory or the like and extinguishes a fire that has occurred in the duct, which is a closed space in which a fire is expected to occur.

Patent Document 1 discloses a fire extinguishing device for a fire in a smoke exhaust duct. In this fire extinguishing device, the fuse metal of the heat detector integrated nozzle installed in the smoke exhaust duct is melted by heat, and atomized water is sprayed into the smoke exhaust duct to cause a fire in the smoke exhaust duct. extinguish a fire.

Japanese Unexamined Patent Publication No. 8-107943

However, in the above-mentioned Patent Document 1, it is necessary to dispose the mist-like water in the nozzle integrated with the heat detector above the inside of the duct, and the arrangement location is limited. In addition, it is necessary to install the water storage cylinder in an appropriate place via a pipe, and there is a problem that the installation place is also limited.

An object of the present invention is to provide a fire extinguishing device that solves the above-mentioned problems, is easy to install, and can surely extinguish a fire by ejecting a fire extinguishing gas to a place where a fire occurs.

The fire extinguishing device according to the present invention for achieving the above object is inserted into an insertion hole provided in a closed space, and is arranged at a ejection portion which is a tubular closed body and outside the closed space, and a bottom portion of the ejection portion. A fire extinguishing device including a fire extinguishing gas accommodating portion connected to the above, wherein the ejection portion is composed of a main body portion made of a heat-resistant member and having an ejection hole, and a heat melting member which is melted by heat, and seals the ejection hole. It is characterized by being composed of a stationary body.

According to the fire extinguishing device according to the present invention, it is possible to install the fire extinguishing device at an arbitrary place in a closed space and it is easy to install, and the fire extinguishing gas is surely ejected to the place where the fire occurs. The fire can be extinguished.

It is a perspective view of a fire extinguishing device. It is a block diagram of a state in which a fire extinguishing device is installed in a duct. It is explanatory drawing of the state that the fire occurred in the duct.

The present invention will be described in detail based on the present examples.
FIG. 1 is a perspective view of the fire extinguishing device of this embodiment, and FIG. 2 is a configuration diagram of a state in which the fire extinguishing device is installed in the duct D.

The fire extinguishing device 1 is composed of a planar ejection portion 2 to be inserted into an insertion hole D1 formed in the bottom surface of the duct D, and a fire extinguishing gas storage portion 3 connected to the bottom portion of the ejection portion 2.

The ejection portion 2 is a tubular main body portion 2a having a top closed portion, a vertically elongated ejection hole 2b provided on the side surface of the main body portion 2a, and a sealing body 2c that closes and seals the ejection hole 2b. It is composed of and.

The main body 2a is made of a metal such as aluminum or iron having a thickness of about 1 to 2 mm, or a heat-resistant member such as a heat-resistant resin body, and has a cylindrical shape, for example. The size of the main body 2a is, for example, about 2 cm in diameter and about 20 cm in height, and an appropriate size can be adopted according to the size of the duct D to be installed.

Further, although not shown, the lower end of the main body 2a is provided with an external screw, for example, and has a structure that can be screwed into a screw hole provided in the fire extinguishing gas storage unit 3 and connected to the fire extinguishing gas storage unit 3. Has been done.

The ejection hole 2b of the main body 2a has a size of about 0.5 cm in width and about 2 cm in length, and the sealing body 2c has a thickness of, for example, 2 mm and a size of fitting into the ejection hole 2b, for example, about 80 ° C. It consists of a hot-melting member, which is a resin body that melts by heat. In addition to the melting temperature of about 80 ° C., an appropriate hot melting member having a different melting temperature may be adopted depending on the installation location such as 120 ° C. and 150 ° C.

The sealing body 2c that seals the ejection hole 2b is held by welding and adhering the outer edge portion of the sealing body 2c to the ejection hole 2b so as to withstand the gas pressure of the fire extinguishing gas G in the main body 2a. There is. Alternatively, a groove portion may be provided in the outer edge portion of the sealing body 2c so that the edge portion of the ejection hole 2b is fitted and held in the groove portion, and the fitting portion may be further adhered.

Further, the edge portion of the ejection hole 2b has a tapered shape that expands from the inner peripheral surface to the outer peripheral surface so that the fire extinguishing gas G ejected outward can be easily diffused. The ejection hole 2b is sealed by the sealing body 2c having a smooth tapered surface.

Since the center position of the ejection hole 2b is preferably located at the center position with respect to the cross section of the duct D when the ejection portion 2 is installed in the duct D described later, the height of the ejection portion 2 is the duct. Depending on the size of D, an appropriate height will be adopted.

Further, by manufacturing the ejection portion 2 corresponding to the duct D having the smallest cross section, preparing a cylindrical spacer corresponding to the size of the duct D, and connecting an appropriate spacer to the lower end of the ejection portion 2, the ejection portion 2 is ejected. The height of the part 2 may be adjusted. This spacer has a structure having, for example, an external screw that can be connected to the storage box 3a at the lower end and an internal screw that can be connected to the ejection portion 2 at the upper end.

The fire extinguishing gas storage unit 3 which is connected to the ejection unit 2 and fixed to the lower outer part of the duct D by a frame or the like is a cylinder in which the storage box 3a is filled with a nonflammable fire extinguishing gas G such as nitrogen in a high pressure state. The fire extinguishing gas storage body 3b is stored in a horizontal state. The fire extinguishing gas storage body 3b is fixed by a fixture (not shown) so as not to move in the fire extinguishing gas storage unit 3, and the fire extinguishing gas storage unit 3 can be replaced by releasing the fixture.

The fire extinguishing gas accommodating body 3b is always filled with a fire extinguishing gas G having a gas pressure of about 1500 Pa in the ejection portions 2 connected at right angles via a pressure reducing valve 3c which is an outlet portion at the tip. ..

Since the ejection portion 2 has a closed structure, even if the ejection portion 2 is filled with a pressurized gas, the gas does not leak from the ejection hole 2b except for melting the sealing body 2c. Therefore, normally, the fire extinguishing gas G filled in the ejection portion 2 does not leak to the outside from the ejection portion 2.

Further, the lower end of the ejection portion 2 is connected to the storage box 3a of the fire extinguishing gas storage portion 3 by screwing or the like, and the above-mentioned spacer or the like is formed by opening the side surface or the like of the storage box 3a and closing the pressure reducing valve 3c. Can be used to replace and adjust with a spouting portion 2 of an appropriate length. Similarly, the fire extinguishing gas accommodating body 3b can be replaced by closing the pressure reducing valve 3c and opening the fixture.

When installing the fire extinguishing device 1, the ejection portion 2 of the fire extinguishing device 1 is inserted into the duct D through the insertion hole D1 provided in the duct D as shown in FIG. The gas storage unit 3 is arranged. Further, the insertion hole D1 and the ejection portion 2 are sealed with a seal body or the like so that the gas in the duct D does not leak from the insertion hole D1.

The duct D in which the fire extinguishing device 1 is installed is, for example, an air supply / exhaust duct installed in a factory or the like, and the exhaust duct exhausts air containing oil, dust, etc. to the outside. Further, as the duct D, a smoke exhaust duct may be used to exhaust the smoke exhaust generated by cooking in the kitchen to the outside.

Further, the fire extinguishing device 1 can be installed as long as it is a closed space partitioned from the outside. For example, the fire extinguishing device 1 can be installed in an uninterruptible power supply for business use. In such a case, the ejection portion 2 can be arranged in the housing of the box-shaped uninterruptible power supply which is a closed space, and the fire generated by the heat generation of the battery or the like can be extinguished promptly.

The ejection hole 2b to which the sealing body 2c is attached is arranged toward the leeward side with respect to the air flow in the duct D indicated by the arrow in FIG. 2, and is a storage box for storing the fire extinguishing gas storage body 3b in the horizontally placed state. 3a is arranged along the longitudinal direction of the duct D. The fire extinguishing gas storage unit 3 may be appropriately rotatable with respect to the ejection unit 2 depending on the installation location.

The reason for arranging the ejection hole 2b toward the leeward side is that the fire extinguishing gas G can be efficiently ejected from the windward side to the place where the fire occurs. Further, if the ejection holes 2b are arranged so as to face upwind, oil and dust will adhere to the sealing body 2c. As a result, even if the temperature at which the sealing body 2c melts due to a fire occurs, the sealing body 2c does not melt or only a part of the sealing body 2c melts. On the other hand, by arranging the ejection holes 2b toward the leeward side, oil and dust are less likely to adhere to the sealing body 2c.

An exhaust fan F provided in the vicinity of the exhaust portion H on the wall surface of the building can be mentioned as a place where a fire is likely to occur in the duct D. When the blade body F1 of the exhaust fan F is rotated by the motor, an air flow is generated in the direction of the arrow, and heated air, dust, air containing oil mist, etc. are discharged to the outside via the exhaust unit H. ..

Oil and dust adhere to the vicinity of the motor of the exhaust fan F with long-term use, and heat generation of the motor and electric sparks due to the oil and dust are generated, which easily ignites. Therefore, it is preferable that the ejection portion 2 is arranged in the duct D on the upstream side of the exhaust fan F.

For example, as shown in FIG. 3, when the exhaust fan F is ignited by an electric spark, the temperature inside the duct D rises. When the temperature rises due to the fire causes the sealing body 2c to reach a predetermined melting temperature or higher, the sealing body 2c that has sealed the ejection portion 2 is melted, and the fire extinguishing gas G is ejected from the ejection hole 2b.

The fire extinguishing gas G pressurized in the ejection portion 2 is vigorously ejected from the ejection hole 2b, and the ejection hole 2b is formed in a tapered shape, so that the inside of the duct D is efficiently expanded in the downstream direction. It spouts and extinguishes the ignition of the exhaust fan F. Once the extinguishing gas G is started to be ejected from the ejection hole 2b, the extinguishing gas G is continuously ejected until the extinguishing gas G in the extinguishing gas accommodating body 3b is exhausted.

In this way, even if a fire occurs in the duct D, the fire extinguishing device 1 according to the present embodiment can generate a fire extinguishing gas G and extinguish the fire before the fire becomes large.

In order to resume the use of the duct D after the fire extinguishing device 1 has finished extinguishing the fire, the fire extinguishing device 1 is replaced with a new one. Alternatively, the fire extinguishing gas accommodating body 3b is replaced with a new one filled with fire extinguishing gas, the ejection part 2 in which the sealing body 2c is melted is replaced with a new one, and the sealing body 2c is repacked and reused. You may.

The ejection portion 2 of the fire extinguishing device 1 may be inserted from the side portion or the upper portion of the duct D depending on the surrounding conditions, instead of being inserted from the lower portion of the duct D as in the embodiment, and the insertion direction thereof is also It can also be inserted parallel to the duct D from the corner of the duct D. When parallel to the duct D, the ejection hole 2b needs to be provided at the tip or the periphery of the ejection portion 2.

Further, one fire extinguishing device 1 is not always arranged for one duct D, and as shown in FIG. 3, a plurality of fire extinguishing devices 1 are spaced apart from each other for one long duct D. May be provided.

Further, the ejection unit 2 is attached to each of the plurality of ducts D, the fire extinguishing gas storage unit 3 is used as a single unit, the piping between the plurality of ejection units 2 and the fire extinguishing gas storage unit 3 is shared, and the fire extinguishing gas storage unit 3 is used. It is also possible to reduce the number of.

In the embodiment, it has been described that the fire extinguishing device 1 is arranged in the duct D, but the fire extinguishing device 1 is not necessarily the duct D, and can be applied to a closed space having a non-duct shape. In this case, the ejection portion 2 is arranged in the closed space, and the fire extinguishing gas storage portion 3 is arranged outside the closed space.

According to the fire extinguishing device according to the present invention, since a power supply, wiring, piping, etc. are not required for a closed space such as a duct D, it can be installed at an arbitrary place and is easy to install. In addition, since the fire extinguishing gas is vigorously ejected to the place where the fire occurs, the fire can be surely extinguished before the place where the fire occurs spreads.

1 Fire extinguishing device 2 Ejecting part 2a Main body part 2b Ejecting hole 2c Sealing body 3 Fire extinguishing gas storage part 3a Storage box 3b Fire extinguishing gas storage body D Duct D1 Insertion hole F Exhaust fan H Exhaust part

Claims (7)

A fire extinguishing device including a ejection portion that is inserted into an insertion hole provided in a closed space and is a tubular closed body, and a fire extinguishing gas storage portion that is arranged outside the closed space and connected to the ejection portion.
The fire extinguishing device is characterized in that the ejection portion is composed of a main body portion made of a heat-resistant member and having an ejection hole, and a sealing body composed of a heat-melting member formed of a heat-melting member and sealing the ejection hole. The fire extinguishing device according to claim 1, wherein the ejection portion is filled with a fire extinguishing gas having a predetermined gas pressure from the fire extinguishing gas accommodating portion. The fire extinguishing device according to claim 1 or 2, wherein the ejection hole is arranged toward the leeward side of the air flow in the closed space. The fire extinguishing device according to any one of claims 1 to 3, wherein the center of the ejection hole of the ejection portion is arranged at the center position with respect to the cross section of the closed space. The fire extinguishing device according to any one of claims 1 to 4, wherein the fire extinguishing gas storage body in the fire extinguishing gas storage unit is placed horizontally. The fire extinguishing device according to any one of claims 1 to 5, wherein the ejection hole is formed in a tapered shape. The fire extinguishing device according to any one of claims 1 to 6, wherein the closed space is an air supply / exhaust duct.

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